Cholpon-Ata. There is an Open Air Museum , sometimes referred as a Stone Garden , which covers some 42 hectares and contains a number of prehistoric monumental structures (stone circles, tombs, the remains of a boundary stone wall, balbals) and Petroglyphs (dating from the II millennium BC up to the Middle Ages upto the VI century AD).

Rock art in Northumberland, England. Featuring a mysterious mix of concentric circles, interlocking rings and hollowed cups, they are broadly dated between 4,000 and 6,000 years old. They may have been used in feasting or as part of a ritual, perhaps even as territorial markers or 'signposts'. The precise meaning of the carvings remains a delicious mystery. Photo: Brian Kerr